June Books 10) The Best Science Fiction of the Year #4, edited by Terry Carr
This was one of the sf anthologies that made a huge impression on me as a teenager, and I think about half of the ten stories fully retain their magic for me - "We Purchased People" by Fred Pohl, "The Hole Man" by Larry Niven, "The Author of the Acacia Seeds [etc]" by Ursula Le Guin, "A Little Something For Us Tempunauts" by Philip K. Dick, and "If The Stars Are Gods" by Gordon Eklund and Gregory Benford. (And the other five aren't bad either.) God be with the days when you could credibly do a Year's Best SF with only ten stories, though. Also notable that there is only one woman (Le Guin) of the ten, which I hope would be impossible today.